OLUWATOSIN MULERO
Data Analyst
LONDON,EALING & HOUNSLOW
Summary
Highly analytical and detail-oriented data professional with combined experience as a CRM Database Cleanse Officer, Data Analyst, and Data Scientist, specialising in data quality improvement, CRM data cleansing, business intelligence, and advanced analytics. Demonstrated success in managing large datasets, improving database accuracy, identifying trends, and producing insight-driven reports and dashboards that support strategic and operational decisions. Proficient in SQL, Python, R, Power BI, Excel, Salesforce, and Dynamics 365, with strong capability in data cleansing, ETL processes, data validation, statistical analysis, data visualisation, and performance reporting. Experienced in collaborating with cross-functional teams to strengthen data governance, optimise workflows, and deliver reliable, high-quality data solutions. Recognised for accuracy, problem-solving, and the ability to turn complex data into clear business value.
Overview
5
5
years of professional experience
Work History
CRM Database Cleanse Officer
Ealing & Hounslow Community & Voluntary Service (EHCVS)
London
09.2025 - Current
- Lead data quality and cleansing activities across the organisation’s CRM and related datasets, improving accuracy, completeness and usability of records underpinning funding, volunteering and community-engagement reporting.
- Design and implement validation rules, standardisation routines and duplicate-management processes, working with data owners and governance leads to embed better data entry practices.
- Develop Power BI reports and dashboards to monitor engagement, activity and outcomes across programmes, enabling leadership to track KPIs and target interventions.
- Translate non-technical stakeholder requirements into clear reporting specifications and data models, ensuring that outputs are intuitive, self-service and aligned to strategic priorities.
- Promote data literacy by supporting colleagues with ad-hoc analysis, demos and “how-to” guides, helping staff use insight to plan services and evidence impact.
Data Scientist
Amdari Digital (Consultancy)
London
08.2025 - 11.2025
- Delivered advanced analytics solutions for clients, including forecasting, customer segmentation and performance modelling to support commercial and operational decision making.
- Built end-to-end Power BI solutions from raw data ingestion and transformation (Power Query, SQL) through to data modelling and interactive dashboards.
- Applied Python-based analytics (e.g. regression, time-series approaches) to explore scenarios and surface opportunities for performance improvement.
- Worked closely with senior stakeholders to define analytical questions, prioritise backlogs and present results in clear story-driven slide decks and dashboard walk-throughs.
- Contributed to internal best-practice standards for documentation, version control and peer review of analytical products.
Data Analyst
TechDrive Consulting Limited
London
09.2023 - 08.2025
- Led on the design, development and maintenance of Power BI dashboards and reports across multiple projects, providing senior clients with clear visibility of KPIs and operational performance.
- Combined data from disparate systems (CRM, finance, operations, web) into integrated analytical datasets, using SQL and data-warehouse principles to ensure consistency and re-use.
- Produced robust analytical models to support strategic questions such as demand forecasting, customer retention and service optimisation.
- Partnered with senior managers to refine measures, definitions and targets, ensuring that dashboards reflected real-world outcomes rather than just operational outputs.
- Improved data quality and reporting efficiency by introducing standardised data dictionaries, data-quality checks and automated refresh processes.
- Mentored junior analysts on Power BI, SQL and analysis techniques, and contributed to team standards for visual design and UX.
Data Analyst
HiWriters Research Hub
09.2020 - 08.2023
- Analysed large quantitative and qualitative datasets from surveys, studies and client research projects to generate actionable insight and recommendations.
- Created BI and reporting solutions (primarily in Power BI and Excel) to track project progress, participant engagement and outcomes against agreed KPIs.
- Designed and executed data cleansing, validation and transformation workflows, improving confidence in reported findings.
- Collaborated with non-technical stakeholders, explaining complex analyses in clear language and tailoring outputs (dashboards, summaries, visualisations) to varied audiences.
- Produced high-quality written reports, charts and infographics to support publication, funding applications and executive presentations.
Data Analyst Intern
Gateway ICT
Ogun State
10.2018 - 10.2019
- Supported senior analysts with data collection, cleansing and integration from transactional and operational systems.
- Assisted in building Excel and early Power BI reports to monitor service performance and client activity.
- Documented data flows, field definitions and business rules to support future BI and data-warehouse development.
- Gained foundational experience in SQL, relational databases and structured analytical approaches.
Education
Master of Science - Data Science
University of Greenwich
London, England2024
Bachelor of Science - Computer Science
North American University
Benin2020
Skills
Data Management & CRM:
CRM Database Cleansing, Data Cleansing, Data Validation, Data Quality Assurance, Data Integrity, Data Governance, Data Standardisation, Data Deduplication, Database Management, Record Maintenance, Data Auditing, Data Reconciliation, Customer Data Management, CRM Data Quality Improvement
Data Analysis & Reporting:
Data Analysis, Exploratory Data Analysis, Statistical Analysis, Trend Analysis, KPI Reporting, Performance Monitoring, Business Intelligence, Management Reporting, Dashboard Development, Data Visualisation, Insight Generation, Report Writing, Decision Support
Data Science & Advanced Analytics:
Predictive Analytics, Data Modelling, Machine Learning Fundamentals, Feature Engineering, Model Evaluation, Forecasting, Pattern Recognition, Quantitative Analysis, Data-Driven Decision Making
Technical Tools & Systems:
SQL, Python, R, Microsoft Excel, Power BI, Tableau, Salesforce CRM, Microsoft Dynamics 365, Power Query, DAX, Jupyter Notebook, Google Sheets, SPSS, Relational Databases
Data Processing & Improvement:
ETL Processes, Data Extraction, Data Transformation, Data Loading, Data Wrangling, Data Preprocessing, Process Improvement, Workflow Optimisation, Data Accuracy Improvement
Professional Skills:
Analytical Thinking, Problem-Solving, Attention to Detail, Communication Skills, Stakeholder Management, Cross-Functional Collaboration, Time Management, Documentation, Accuracy, Confidentiality, Organisational Skills
Websites, Portfolios and Profiles
www.linkedin.com/in/oluwatosin-mulero-55a578140
https://tosinmulero.github.io/
Work Availability
monday
tuesday
wednesday
thursday
friday
saturday
sunday
morning
afternoon
evening
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Timeline
CRM Database Cleanse Officer
Ealing & Hounslow Community & Voluntary Service (EHCVS)
09.2025 - Current
Data Scientist
Amdari Digital (Consultancy)
08.2025 - 11.2025
Data Analyst
TechDrive Consulting Limited
09.2023 - 08.2025
Data Analyst
HiWriters Research Hub
09.2020 - 08.2023
Data Analyst Intern
Gateway ICT
10.2018 - 10.2019
Master of Science - Data Science
University of Greenwich
Bachelor of Science - Computer Science
North American University